Method and device for data backup in 3DC through incremental snapshots, and medium

Abstract

The invention discloses a method and a device for data backup in 3DC through incremental snapshots and a medium, and the method comprises the steps: transmitting newly added data in a production volume to a city-wide disaster backup center; obtaining a corresponding forward incremental snapshot according to the newly added data and storing the forward incremental snapshot in the target volume; andtransmitting the forward incremental snapshot of the target volume to a remote disaster backup center. According to the method, the corresponding forward increment snapshot is obtained according to the newly added data of the production volume and is stored in the target volume; the forward incremental snapshot of the target volume is transmitted to a remote disaster backup center; in the prior art, during parallel connection, a production volume of a production center provides main volumes of two transmission relationships of backup data for disaster backup centers in the same city and disaster backup centers in different places; when the disaster recovery volumes are connected in series, the first disaster recovery volume of the disaster backup center in the same city is a target volumeof one transmission relationship and a main volume of another transmission relationship, so that the data transmission relationship becomes simple, and the logic processing difficulty of the data transmission relationship is reduced.

Description

technical field [0001] The invention relates to the field of computers, in particular to a method, device and medium for backing up data in a 3DC through an incremental snapshot. Background technique [0002] With the rapid development of computer technology, systems developed based on computer technology play an increasingly important role in all walks of life. If the system is interrupted, it will not only affect the brand image, but also may lead to the loss of important data and huge economic losses. [0003] In recent years, in order to ensure the continuity of system work, the Three data center in two sites (3DC) consisting of a production center (site1), an intra-city disaster backup center (site2) and a remote disaster backup center (site3) has been established. ) Disaster recovery solutions are gradually recognized and valued by the industry. Among them, the data backup of site1 to site2 usually adopts synchronous remote replication or active-active. Site2 usually...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, site1, site2 and site3 in the 3DC disaster recovery solution are connected in parallel (site1->site2, site1->site3) or in series (site1->site2, site2->site3). In this case, the production volume in site1 is also the primary volume of the relationship between synchronous remote replication / active-active and asynchronous remote replication. In the case of serial connection, the first disaster recovery volume in site2 is both the target volume of synchronous remote replication / active-active and asynchronous remote The main volume of the copy relationship makes the data transmission relationship complicated and increases the difficulty of logical processing to realize the data transmission relationship

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